srclist overlap message for exposure 3 of trigger 973140
uvot_overlap.pl vrs. 2010-12-20b fem started at 200519d22h14m01s354442usUT
The observation of trigger 973140 started 2020-05-19T11:35:18.8
Examining file ./973140_g894_uvot_sky_srclist.fits
The exposure ID is 611580918
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (255.3400,-30.3805) with a roll angle of 117.6
It is square with sides of 12.05 arc min. for an area of 145.15 sq arc min
The BAT error circle is centered at (255.3340,-30.3800) with a radius of 3.000 arc min
This is 0.314 arc min from the center of the uvot region
The area of the BAT error circle is 28.27 sq. arc min
The UVOT/BAT overlap is 28.27 sq. arc min or 1.00 of the BAT error circle
The XRT error circle is centered at (255.3332,-30.3783) with a radius of 0.030 arc min
This is 0.380 arc min from the center of the uvot region
The area of the XRT error circle is 0.003 sq. arc min
The UVOT/XRT overlap is 0.003 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 3 of trigger 973140
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200519d22h14m44s432517usUT
Observation start time is 2020-05-19T11:35:18.8
Examining file ./973140_g894_uvot_catalog_srclist.fits
The exposure ID is 611580918
The exposure is 98.322 sec.
The bin size is 2 pixels
The filter is WHITE
There are 190 detected source(s) for 973140_g894
*** WARNING -- the sources have filled the available telemetry buffer (190).
srclist_overlap returned: bat_overlap 0.234
srclist_overlap returned: xrt_overlap 0.000
Dimmest detected source in 973140_g894 has mag 19.03
Aspect correction adds 0.00100 degrees (0.239 sec of time = 3.09 arc sec) to RA
Aspect correction adds -0.00053 degrees (-1.92 arcsec) to Dec
Total aspect correction is 3.64 arcsec
Star catalogs centered at 255.3717 , -30.3468 with radius 8.00 arc min.
n_usno: 5005 n_gsc: 0
*** WARNING -- bright star catalog has 6 entries brighter than 12 mag
The brightest has mag 9.56026
RA DEC Mag Color
bright star 0: 255.33437 (17:01:20.25) -30.31969 (-30:19:10.9) 11.27 USNO-V
bright star 1: 255.33189 (17:01:19.65) -30.31886 (-30:19:07.9) 11.58 USNO-R
bright star 2: 255.33079 (17:01:19.39) -30.31860 (-30:19:07.0) 9.62 USNO-R
bright star 3: 255.32854 (17:01:18.85) -30.31869 (-30:19:07.3) 11.90 USNO-R
bright star 4: 255.44908 (17:01:47.78) -30.30019 (-30:18:00.7) 9.82 USNO-V
bright star 5: 255.45482 (17:01:49.16) -30.29907 (-30:17:56.7) 9.56 USNO-V
Mean distance difference (CAT_DELTA) for 157 matched entries is 0.978" for 973140_g894
Mean and std. dev of mag. difference (MAG_DELTA) are 1.613 and 0.802 for 973140_g894
Found 39 entries without IDs and 2 entries that are acceptable afterglow candidates for 973140_g894.
Acceptable entries have no ID, XRT distances < 5", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
4 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=255.3340 (17:01:20.16) DEC=-30.3800 (-30:22:48.0)
XRT distances are from RA=255.3332 (17:01:19.96) DEC=-30.3783 (-30:22:41.7)
-----------------
Entry 3 in the list of sources is a candidate afterglow for 973140_g894 with 3x3 stamp
ra=255.34836 (17:01:23.61) dec=-30.34123 (-30:20:28.4) +/- 1.1" mag=17.63+/-0.35
dist=141.4 REFID=53
*** The position of this source is inconsistent with the XRT position.
The position is 146.5 arc sec from the BAT position.
src: 3 distr. of nearby unmatched sources: 0 0 0 0 0
Found 12 entries in star catalog(s) within 20.0" of the candidate.
printing all entries
(Entries within 2 arc sec of a source list entry are considered a match)
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
255.3529 -30.3405 14.4 -1 USNO-B1 26.62 99.99 99.99
255.3510 -30.3398 9.5 -1 USNO-B1 18.74 16.92 17.73
255.3498 -30.3429 7.5 -1 USNO-B1 18.82 99.99 99.99
255.3487 -30.3438 9.3 -1 USNO-B1 18.83 23.64 21.50
255.3482 -30.3459 16.8 -1 USNO-B1 17.38 17.67 17.54
255.3494 -30.3387 9.6 -1 USNO-B1 18.53 15.48 16.84
255.3484 -30.3403 3.3 -1 USNO-B1 16.22 13.88 14.92 *
255.3499 -30.3372 15.3 -1 USNO-B1 18.16 17.82 17.97
255.3464 -30.3453 16.0 -1 USNO-B1 18.35 17.80 18.04
255.3476 -30.3399 5.3 -1 USNO-B1 17.32 99.99 99.99
255.3473 -30.3360 19.2 -1 USNO-B1 18.32 14.64 16.27
255.3456 -30.3380 14.3 -1 USNO-B1 18.34 17.09 17.64
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 17 in the list of sources is a candidate afterglow for 973140_g894 with 1x1 stamp
ra=255.38325 (17:01:31.98) dec=-30.35080 (-30:21:02.9) +/- 1.1" mag=17.76+/-0.35
dist=184.3 REFID=115
*** The position of this source is inconsistent with the XRT position.
The position is 185.6 arc sec from the BAT position.
src: 17 srclist_match has ID
src: 17 distr. of nearby unmatched sources: 0 0 0 0 0
Found 14 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
255.3784 -30.3479 18.3 -1 USNO-B1 18.02 17.73 17.86
255.3779 -30.3509 16.7 -1 USNO-B1 18.32 17.73 17.99
255.3794 -30.3495 12.7 -1 USNO-B1 14.95 14.16 14.51
255.3810 -30.3489 9.7 -1 USNO-B1 16.49 99.99 99.99
255.3790 -30.3527 14.7 -1 USNO-B1 17.72 17.69 17.70
255.3808 -30.3533 11.9 -1 USNO-B1 18.61 17.42 17.95
255.3836 -30.3507 1.2 -1 USNO-B1 99.99 12.73 99.99 *
255.3850 -30.3479 11.8 -1 USNO-B1 16.75 16.91 16.84
255.3846 -30.3507 4.1 -1 USNO-B1 14.91 99.99 99.99
255.3819 -30.3552 16.5 -1 USNO-B1 17.15 17.37 17.27
255.3858 -30.3483 12.1 -1 USNO-B1 17.61 17.77 17.70
255.3836 -30.3559 18.4 -1 USNO-B1 17.61 17.79 17.71
255.3844 -30.3555 17.4 -1 USNO-B1 18.00 99.99 99.99
255.3884 -30.3541 19.9 -1 USNO-B1 18.83 16.21 17.37
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Found 3 entries in star catalog(s) within 10" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
255.3332 -30.3800 6.3 -1 USNO-B1 18.45 19.20 18.87
255.3312 -30.3797 7.9 -1 USNO-B1 17.92 19.14 18.60
255.3324 -30.3808 9.5 -1 USNO-B1 18.23 17.79 17.99
The closest star is 6.33" away.
List UVOT sources within 10" of the XRT position:
There are no candidates inside BAT error circle, but outside XRT error circle.
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 18.99, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
srclist paragraph message for exposure 3 of trigger 973140
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: damaged image (negative pixel value)
SRCLIST PROBLEM: srclist filled telemetry buffer
See notes for more details.
------ Start for Possible Stand-alone Circular ----
In response to GRB200519 (Swift/BAT trigger 973140) at 11:20:23 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 98 seconds with the White filter
starting 870 seconds after the BAT trigger. No credible afterglow candidate has
been found in the initial data products. The 2.7'x2.7' sub-image processing
FAILED because of damaged image (negative pixel value). The 8'x8' region for
the list of sources generated on-board covers 0.00% of the XRT error circle. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.47.
------- notes for trigger 973140 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200519d22h14m52s797016usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=973140
-expid=611580918 -meonly -msg_srclist
Results from standard processing of UVOT TDRSS data for this trigger should be
available at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/973140/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
The Genie image appears to be DAMAGED with a min. value of -2639.190674.
XRT position found for srclist. XRT position found for Genie image. BAT
position found.
UVOT exposure began at MET 611580918.8044 or about 2020:140:11:35:13 UT
Found 5000 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 54% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 39 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 18.99 mag.
Found 47 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 4 Genie image source(s) without IDs. There are 1 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.03 mag. Found 1000 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 107% of the Genie image region. The
Genie image is INCOMPLETE with 5242 null pixels.
The number of srclist sources filled the available telemetry. The weakest
source detected was 19.03 mag. The closest srclist source has ra= 255.3551 dec=
-30.3518 mag=15.29 sep=117.22".
Report rejected UVOT sources within 10 arcsec XRT position.
Such sources are usually NOT the afterglow.
****THIS SOURCE NEAR XRT POSITION WAS REJECTED--USE WITH CAUTION****
UVOT took a finding chart exposure of 98 seconds with the White filter
starting 870 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 17:01:20.00 = 255.33333
DEC(J2000) = -30:22:41.1 = -30.37807
with a 90%-confidence error radius of about 0.62 arc sec. This position is 0.81
arc sec. from the center of the XRT error circle. The estimated magnitude is
17.17 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.47.
All AG candidates sorted by magnitude for the current finding chart.
(U/V/White SRCLIST mags < 17.5/17.5/18.5 are reliable. Mag > 18.5/18.5/19.5 are
not. Others are uncertain.)
(U/V/White Genie image mags < 18.0/18.0/19.0 are reliable. Mag > 19.0/19.0/20.0
are not. Others are uncertain.)
(Magnitudes followed by * have been corrected for exposure.)
---MET--- -dt- filter ---RA-- ---DEC--- -MAG/Limit Dist(") Source Asp.Corr?
611580918 869 WHITE srclist found no candidates.
611580918 869 WHITE 255.33333 -30.37807 17.17/20.0 0.8 image Yes
List afterglow candidates for other finding charts.
611580106 57 WHITE 255.33332 -30.37797 16.46/19.2 1.1 srclist Yes
611580106 57 WHITE 255.33335 -30.37803 15.38/20.3 1.0 image Yes
611580318 269 U 255.33323 -30.37815 17.02/18.1 0.4 srclist Yes
611580318 269 U 255.33342 -30.37805 16.18/20.1 1.1 image Yes
------- Tokens for Quick GCN -------